There has always been a shortage of drivers. I've been with my current company 17 yrs. Once we had a few guys laid off, but within 6 months we were hiring again. Our company even took to an apprenticeships program to fill the slots and we still need drivers most of the time.
On researching the prospect of commercial truck driving, I do find that the trucking industry business and training model seems awefully flawed in many cases, largely because of government regulations and hiring practice subsidy interference that drives business owners to churn through drivers and treat them like a cheap commodity rather than a valued asset that gets properly trained, gains experience over time and stays with a company. From what I can gather, most companies treat long haul drivers as cheap labor "contractors", not employees, per se. At least that's my perception.